# frozen_string_literal: true

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#

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# tmpdir - retrieve temporary directory path

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#

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# $Id$

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#

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require 'fileutils'

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begin

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require 'etc.so'

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rescue LoadError # rescue LoadError for miniruby

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end

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class Dir

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@@systmpdir ||= defined?(Etc.systmpdir) ? Etc.systmpdir : '/tmp'

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##

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# Returns the operating system's temporary file path.

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def self.tmpdir

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tmp = nil

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[ENV['TMPDIR'], ENV['TMP'], ENV['TEMP'], @@systmpdir, '/tmp', '.'].each do |dir|

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next if !dir

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dir = File.expand_path(dir)

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if stat = File.stat(dir) and stat.directory? and stat.writable? and

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(!stat.world_writable? or stat.sticky?)

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tmp = dir

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break

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end rescue nil

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end

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raise ArgumentError, "could not find a temporary directory" unless tmp

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tmp

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end

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# Dir.mktmpdir creates a temporary directory.

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#

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# The directory is created with 0700 permission.

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# Application should not change the permission to make the temporary directory accessible from other users.

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#

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# The prefix and suffix of the name of the directory is specified by

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# the optional first argument, <i>prefix_suffix</i>.

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# - If it is not specified or nil, "d" is used as the prefix and no suffix is used.

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# - If it is a string, it is used as the prefix and no suffix is used.

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# - If it is an array, first element is used as the prefix and second element is used as a suffix.

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#

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# Dir.mktmpdir {|dir| dir is ".../d..." }

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# Dir.mktmpdir("foo") {|dir| dir is ".../foo..." }

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# Dir.mktmpdir(["foo", "bar"]) {|dir| dir is ".../foo...bar" }

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#

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# The directory is created under Dir.tmpdir or

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# the optional second argument <i>tmpdir</i> if non-nil value is given.

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#

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# Dir.mktmpdir {|dir| dir is "#{Dir.tmpdir}/d..." }

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# Dir.mktmpdir(nil, "/var/tmp") {|dir| dir is "/var/tmp/d..." }

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#

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# If a block is given,

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# it is yielded with the path of the directory.

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# The directory and its contents are removed

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# using FileUtils.remove_entry before Dir.mktmpdir returns.

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# The value of the block is returned.

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#

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# Dir.mktmpdir {|dir|

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# # use the directory...

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# open("#{dir}/foo", "w") { ... }

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# }

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#

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# If a block is not given,

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# The path of the directory is returned.

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# In this case, Dir.mktmpdir doesn't remove the directory.

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#

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# dir = Dir.mktmpdir

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# begin

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# # use the directory...

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# open("#{dir}/foo", "w") { ... }

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# ensure

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# # remove the directory.

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# FileUtils.remove_entry dir

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# end

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#

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def self.mktmpdir(prefix_suffix=nil, *rest, **options)

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base = nil

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path = Tmpname.create(prefix_suffix || "d", *rest, **options) {|path, _, _, d|

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base = d

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mkdir(path, 0700)

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}

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if block_given?

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begin

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yield path.dup

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ensure

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unless base

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stat = File.stat(File.dirname(path))

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if stat.world_writable? and !stat.sticky?

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raise ArgumentError, "parent directory is world writable but not sticky"

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end

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end

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FileUtils.remove_entry path

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end

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else

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path

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end

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end

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module Tmpname # :nodoc:

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module_function

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def tmpdir

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Dir.tmpdir

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end

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UNUSABLE_CHARS = "^,-.0-9A-Z_a-z~"

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def create(basename, tmpdir=nil, max_try: nil, **opts)

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origdir = tmpdir

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tmpdir ||= tmpdir()

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n = nil

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prefix, suffix = basename

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prefix = (String.try_convert(prefix) or

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raise ArgumentError, "unexpected prefix: #{prefix.inspect}")

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prefix = prefix.delete(UNUSABLE_CHARS)

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suffix &&= (String.try_convert(suffix) or

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raise ArgumentError, "unexpected suffix: #{suffix.inspect}")

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suffix &&= suffix.delete(UNUSABLE_CHARS)

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begin

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t = Time.now.strftime("%Y%m%d")

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path = "#{prefix}#{t}-#{$$}-#{rand(0x100000000).to_s(36)}"\

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"#{n ? %[-#{n}] : ''}#{suffix||''}"

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path = File.join(tmpdir, path)

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yield(path, n, opts, origdir)

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rescue Errno::EEXIST

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n ||= 0

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n += 1

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retry if !max_try or n < max_try

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raise "cannot generate temporary name using `#{basename}' under `#{tmpdir}'"

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end

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path

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end

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end

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end

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